Introduction
What is a Syllogism?
A syllogism is a deductive argument relating two premises and a conclusion, all of which are quantified propositions, i.e. propositions joining concepts by using words such as ‘some’ and ‘all’. In simple terms, Syllogism is a deductive argument that is primarily composed of 3 propositions. One of the propositions is used as the conclusion of the syllogism and the other two propositions are used as the premises of the syllogism. Deductive Logic is used to derive conclusions from premises where the truth of the conclusion must always be contained in the truth of the premises. Syllogism Practice Quiz 3 presents Syllogism questions with solutions useful for candidates preparing for different competitive examinations like RRB ALP/Technical Exams/Junior Engineer Recruitment Exams, SSC CGL,SSC CHSL, IBPS, SBI PO, SBI Clerks, CAT and etc.
Syllogism is derived from the Greek word syllogisms, meaning conclusion or inference. Some syllogisms contain three components:
- Major Premise
- Minor Premise
- Conclusion
Quiz
Direction (1-5): In each of the following questions there are four statements. Which are followed by three or four conclusions. Choose the conclusions which logically follow from the given statements.
1. Statements:
No door is dog. All the dogs are cats.
Conclusions:
1. No door is cat.
2. No cat is door.
3. Some cats are dogs.
4. All the cats are dogs.
2. Statements:
All men are vertebrates. Some mammals are vertebrates.
Conclusions:
1. All men are mammals.
2. All mammals are men.
3. Some vertebrates are mammals.
4. All vertebrates are men.
3.Statements:
All men are vertebrates. Some mammals are vertebrates.
Conclusions:
1. All men are mammals.
2. All mammals are men.
3. Some vertebrates are mammals.
4. All vertebrates are men.
4. Statements:
All the phones are scales. All the scales are calculators.
Conclusions:
1. All the calculators are scales.
2. All the phones are calculators
3. All the scales are phones.
4. Some calculators are phones.
5. Statements:
Some tables are T.V. Some T.V. are radios.
Conclusions:
1. Some tables are radios.
2. Some radios are tables.
3. All the radios are T.V.
4. All the T.V. are tables.
- A. Only (2) and (4)
B. Only (1) and (3)
C. Only (3) and (4)
D. Only (3)
E. All the four
- A. Only (1) and (2)
B. Only (1) and (3)
C. Only (1) and (4)
D. Only (2) and (4)
E. None of these
- A. Only (4)
B. Only (2)
C. Only (3)
D. Only (1)
E. Only (1) and (3)
- A. Only (1) and (4)
B. Only (3) and (4)
C. Only (2) and (4)
D. Only (1) and (2)
E. Only (1) and (3)
- A. Only (2) and (4)
B. Only (1) and (3)
C. Only (4)
D. Only (1) and (4)
E. None of the four.
Direction (1-5): In each of the following questions there are four statements. Which are followed by three or four conclusions. Choose the conclusions which logically follow from the given statements.
1. Statements: Some pens are books. Some books are pencils.
Conclusions:
1. Some pens are pencils.
2. Some pencils are pens.
3. All pencils are pens.
4. All books are pens.
None of these four conclusion follows.
2. Statements:
All the goats are tigers. All the tigers are lions.
Conclusions:
1. All the goats are lions.
2. All the lions are goats.
3. Some lions are goats.
4. Some tigers are goats.
Only (1), (3) and (4)
3. Statements:
All the books are pencils. No pencil is eraser.
Conclusions:
1. All the pencils are books.
2. Some erasers are books.
3. No book is eraser.
4. Some books are erasers.
Only (3)
4. Statements:
All the research scholars are psychologists. Some psychologists are scientists.
Conclusions:
1. All the research scholars are scientists.
2. Some research scholars are scientists.
3. Some scientists are psychologists.
4. Some psychologists are research scholars.
Only (3) and (4) follows
Direction: In each of the following questions there are three statements. Which are followed by three or four conclusions. Choose the conclusions which logically follow from the given statements.
5. Statements:
All the locks are keys. All the keys are bats. Some watches are bats.
Conclusions:
1. Some bats are locks.
2. Some watches are keys.
3. All the keys are locks
- A. Only (1) and (3)
B. Only (2) and (4)
C. All the four
D. None of the four
E. Only (1)
- A. All the four
B. Only (1), (2) and (3)
C. Only (1), (3) and (4)
D. Only (2), (3) and (4)
E. None of these
- A. Only (3)
B. Only (1) and (3)
C. Only (1) and (2)
D. Only (2) and (3)
E. Only (3) and (4)
- A. Only (3) and (4)
B. None of the four
C. All the four
D. Only (3)
E. Only (2) and (4)
- A. Only (1) and (2)
B. Only (1)
C. Only (2)
D. Only (1) and (3)
E. None of these
Direction (1-5): In each of the following questions there are three statements. Which are followed by three or four conclusions. Choose the conclusions which logically follow from the given statements.
1. Statements:
Some keys are staplers. Some staplers are stickers. All the stickers are pens.
Conclusions:
1. Some pens are staplers.
2. Some stickers are keys.
3. No sticker is key.
4. Some staplers are keys.
2. Statements:
Some questions are answers. Some answers are writers. All the writers are poets.
Conclusions:
1. Some writers are answers.
2. Some poets are questions.
3. All the questions are poets.
Some poets are answers.
3. Statements:
Some envelops are gums. Some gums are seals. Some seals are adhesives.
Conclusions:
1. Some envelopes are seals.
2. Some gums are adhesives.
3. Some adhesives are seals.
4. Some adhesives are gums.
4. Statements:
All the papers are books. All the bags are books. Some purses are bags.
Conclusions:
1. Some papers are bags.
2. Some books are papers.
3. Some books are purses.
5. Statements:
Some rats are cats. Some cats are dogs. No dog is cow.
Conclusions:
1. No cow is cat.
2. No dog is rat.
3. Some cats are rats.
- A. Only (1) and (2)
B. Only (2) and (4)
C. Only (2) and (3)
D. Only (1) and (4) and either (2) or (3)
E. None of these
- A. Only (1) and (2)
B. Only (1) and (4)
C. Only (1) and (3)
D. Only (2) and (4)
E. None of these
- A. Only (3)
B. Only (1)
C. Only (2)
D. Only (4)
E. None of these
- A. Only (1)
B. Only (2) and (3)
C. Only (1) and (2)
D. Only (1) and (3)
E. None of these
- A. Only (1)
B. Only (1) and (2)
C. Only (1) and (3)
D. Only (2) and (3)
E. Only (3)
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